The current study focuses on the numerical analysis of tip vortex flows, with the
emphasis n the investigation of turbulence modelling effects on tip vortex prediction. The
analysis includes comparison of RANS and LES methods at two different mesh resolutions. Implicit
LES, ILES, modelling is employed here to mimic the turbulent viscosity. In RANS, the two equation
k-ω SST model is adopted. In order to also address possible benefits of using streamline curvature
variations in RANS, two curvature correction methods proposed for k-ω SST are tested, and compared.
ILES results show very good agreement with the experimental observations. The predicted vortex in
ILES is also stronger than RANS predictions. ILES has predicted accelerated vortex core axial
velocity very well, while tested RANS models under predict the axial velocity. Adoption of
curvature correction has not improved the tip vortex
prediction, even though it has reduced the turbulent viscosity at the vortex core
